There’s so much we don’t know about the origin of life here or anywhere else in the universe. But there must have been an energy source. Researcher Laurie Barge led work that simulated the natural formation of a fuel cell that may have taken place in Earth’s primordial oceans. With Emily Lakdawalla on vacation, Jason Davis debuts as the LightSail Project’s embedded journalist. Bill Nye is following NASA’s Commercial Crew progress. Bruce Betts takes Mat Kaplan and listeners on another tour of the night sky.